These are useless on their own.

To be used as attachments for custom ratchet spanner tools, insert object and attach to your design.

How to insert (Fusion 360):

• Insert/Insert Mesh, choose file
• Mesh/Prepare/Generate Face Groups, select inserted mesh, click OK
• Mesh/Modify/Convert Mesh, select inserted mesh, select "Prismatic", click OK
• Move converted mesh into position with Modify/Align
• Modify/Combine to join bodies

Make sure to fillet at attachment point for strength.

Sizes included - 1", 3/4", 1/2", 3/8", 1/4"

*image is of a custom tool using the 3/8 file